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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Marathon, ON
Exceptional El Niño dominates this fall
Content continues below
September
Average Temperature
High
16°
Feels 16
Low
9°
Feels 7
Average Precipitation
10 Days
Rain amount
68mm
Snow amount
0.1cm
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Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
13°
19
15°
20
14°
21
14°
22
15°
23
16°
24
16°
25
17°
26
17°
27
16°
28
16°
29
15°
30
15°
Forecast
Friday, September 18, 2026
Day
13°
Feels 13
Wind
14 km/h SW
Gust
21 km/h
Humidity
50%
P.O.P
20%
Night
6°
Feels 4
Wind
10 km/h E
Gust
14 km/h
Humidity
87%
P.O.P
20%
Historical Averages
Sep 18
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.